• The Mathematical Education
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• v.54 no.2
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• pp.167-194
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• 2015

The purpose of this study is to analyze effects of the mathematics integrated career education on students' affective characteristics. For this purpose, 3 hours of lesson materials of the mathematics integrated career education were developed and applied to 65 students of the 10th ~11th graders selected in two high schools. After 3 hours of lessons, the following research findings are obtained. Fisrt, it is revealed from the pre-post test of 65 subjects that the mathematics integrated career education can help students improve their mathematical attitude and belief. Second, it is shown from the interview with 4 students that they became not only to recognize the usefulness and value of mathematics, but also got changed their self-concept for mathematics.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.63 no.1
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• pp.123-131
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• 2014

An INS/vision integrated navigation algorithm is proposed for environments with insufficient number of landmarks. In the proposed algorithm, the raw measurements on the focal plane are directly used in order to cope with the situation where the number of landmarks are not sufficient. In addition to this, the combination of landmarks, which has smallest value of DOP, is used in the update of measurement in order to improve navigation performance. In order to evaluate the performance of the proposed integrated navigation system, Monte-Carlo simulation and van test was performed. The results of the simulation and experiment show that the proposed navigation system gives better navigation performance than an INS/vision integrated navigation system which does not use the raw measurements on the focal plane and the navigation system provides navigation solutions even in environments with insufficient number of landmarks.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.22 no.2
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• pp.311-320
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• 1998

The cryogenic fracture behaviors of austenitic stainless steel HN2 developed for nuclear fusion reactor were evaluated quantitatively by using the small punch(SP) test. The electrochemical polarization test was applied to study thermal aging degradation of HN2 steel. The X-ray diffraction(XRD) analysis was conducted to detect carbides and nitrides precipitated on the grain boundary of the heat treated HN2 steel. The mechanical properties of the HN2 steel significantly decreased with increasing time and temperature of heat treatment or with decreasing testing temperature. The integrated charge(Q) obtained from electrochemical polarization test showed a good correlation with the SP energy(ESP) obtained by means of SP tests. From the results observed in the x-ray diffraction and anodic polarization curve, it was known that the material the grain boundary. Combining SP test and electrochemical polarization test, it could be useful tools to non-destructively evaluate the cryogenic fracture behaviors and the aging degradation for cryogenic structural material.

• The Transactions of the Korea Information Processing Society
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• v.5 no.9
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• pp.2312-2322
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• 1998

Test case for objcctoricnted system's integrated testing must be contained both methowmessage path and result of method execution. For this test case extraction, we should use scenario of dynamic modeling leveL Because we can reduce account of test case through user action's dependency analysis. This paper suggest test case generation method using dynamic modeling scenario. There are two advantages of this method are two. First, we can use computer when we generate test case for object's interaction and test result compare, Second, we can reduce testcase amount.

• Journal of the Korea Society for Simulation
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• v.27 no.1
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• pp.111-117
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• 2018

It is indispensable for a missile to track a target under the flight condition since the tracking capability affects the system performance considerably. The best way to verify the tracker's performance is flight test while it costs too much. Consequently, captive flight test or CFT has an important role in the development of a missile system. CFT, however, cannot simulate missile dynamics and is an offline and open-loop test. In this paper, we propose a new integrated-flight simulation(IFS) method using CFT imagery to overcome the limitation of synthetic image-based IFS method. This method increases the utilization of CFT's outputs and compensates the reality of imagery which lacks in the synthetic image-based IFS. Using this method make it possible to verify the system capability in various simulation modes.

• Korean Journal of Agricultural Science
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• v.47 no.4
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• pp.1123-1134
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• 2020

The goal of this study was to develop an accelerated life test for an implement working pump for an agricultural tractor. The field experiments were conducted to measure the load of an implement working pump during major agricultural operations such as plow tillage, rotary tillage, baler operations, and wrapping operations. The measurement system for an implement working pump load was constructed using a pressure sensor, the engine rotational speed, and the hitch pump displacement. The measured implement working pump load was calculated as an equivalent load for each agricultural operation using the Palmgren-Miner rule, which is a cumulative damage method. The equivalent load was calculated using the total load data and peak load data when the total data included the operation of an implement working. The annual usage time of the agricultural tractor was applied to develop two integrated equivalent loads. The acceleration factor was calculated to develop an accelerated life test and was calculated from the two integrated equivalent loads, the maximum pressure, and the flow rate conditions of the hitch pump. In Korea, the warranty life of a tractor is 2,736 hours, and the time required for the test to guarantee the operational life of tractors was calculated as 7,561 hours. The acceleration factors were calculated as 453.6 and 38.3, respectively, from the total load data and peak load data. The fatigue test time can be shortened by 16.7 and 197.4 hours according to the result of the acceleration factors.

• Journal of Advanced Navigation Technology
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• v.22 no.2
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• pp.64-69
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• 2018

Automatic test equipment for field maintenance of aircraft mounted equipment is effective for integrated design when operating a small number of aircraft for special purposes. The integrated automatic test equipment identifies commonly used interfaces and is used for branching or generating routes for each unit under test specific inspection. High-precision signals such as RTD, TC, and analog voltage can cause measurement errors due to conduction resistance during signal branching and connection when generating branches and paths. The measurement error caused by the resistance of the wire leads to a lot of restrictions in designing the equipment to be inspected. In this paper, we propose a method of calibrating highly accurate signals of an integrated automatic inspection equipment that minimizes measurement errors of analog voltage and high - precision signals.

• Journal of Advanced Technology Convergence
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• v.2 no.3
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• pp.9-15
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• 2023

Recently, various public services are being performed based on information systems as the informatization business spreads. Public administration services based on these information systems provide internal and external services. In recent years, as the construction of cloud-based public services has been expanded, the advancement of information systems has attracted attention. In particular, as the dependence on information systems increases, the establishment of a response system to prevent dangerous situations such as interruption and paralysis of information systems in advance has become a hot topic not only in companies but also in public institutions. Therefore, in this paper, a disaster recovery system was designed and built to maximize the efficiency of system operation and shorten recovery time through service conversion automation of the disaster recovery system. The integrated DR server redundancy test, web server redundancy test, FC-IP redundancy test, and SAN switch redundancy test were performed respectively by applying the disaster recovery system designed and built according to the method proposed in the paper.

• Women's Health Nursing
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• v.10 no.2
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• pp.138-143
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• 2004

Purpose: The purpose of this study was to test the effect of an integrated health promotion program in middle-aged women. Method: The research design was a quasi experimental, one-group pretest-posttest design. Data was collected from July 1st to August 31st, 2003. One group consisted of 30 subjects. The instruments used for the study were the Self Efficacy Scale and the Health Promotion Behavior Scale developed by Park(1995), Subjective health status developed Speake(1989) and menopause-related symptoms developed by Park(1995). The data was analyzed using the SPSS WIN 10.0 program. In order to compare the effects of the pre-post synthesized health promotion program, the ed t-test was employed. Result: There was not a significant increase in subjective health status after the integrated health promotion program, nor was there a significant decrease in menopause-related symptoms after the synthesized health promotion program. There was a significant increase in self efficacy after the integrated health promotion program(p=.029), and there was also a significant increase in health promotion behavior after the integrated health promotion program(p=.006). Conclusions: Through an 8 week education program for health promotion, self efficacy and health promotion behavior were effectively changed in middle-aged women.

• Journal of the Korea Convergence Society
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• v.10 no.5
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• pp.133-140
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• 2019

The purpose of this study is to examine the effects of English integrated instruction on the 6th grade Korean elementary students' English ability using science animation. Twenty-seven students took English integrated instruction before their regular class for 10 minutes while the other students took review activity instead of it. At first, the students were asked to take the sixth grade diagnostic evaluation sponsored by C office of education in 2018 as the pre-test and ten months later, they were asked to take the first grade diagnostic evaluation of middle school sponsored by C office of education in 2017 as the post-test. Results of the study showed that the English ability and the affective attitude of the students taking English integrated instruction were improved. These results suggest that English integrated instruction can contribute to the improvement of Korean elementary students' English ability.